Die-head



W. C. MARKS.

DIE HEAD.

APPLICATION FILED OCT. 1. 1919.

Patented Se t. 14,1920.

FIE-1.1.

FIE-5.31.

4 WITINBSES INVENTOR asasas.

stars 1p TENT WILLARD c. MARKS, or ETNA, PENNSYLVANIA, AssIeNon T0 srANor, GHALFANT & I

00,, inconzeonn'rnn, A CORPORATION on PENNSYLVANIA. v

' DIE-HEAD.

To all 1071 0122 it may 00mm Be it known that I, WILLARD C. MARKs, a citizen of the United States, and a resident of Etna, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Die-Heads; and I do hereby declare the following tobe a full, clear, and exact description thereof.

lily invention relatesto die-heads or holders, and has special reference to, such heads for holding threading dies for use in the manufacture of pipes ortubes.

The object of my invention is to provide a cheap, simple and eflicient diehead, which will provide for the quick opening and closing of the same, will give freedom from wear and give additional strength to its operating parts, will enable the holding of'the die in a more rigid position during the operation I of threading, and will give. increased production, both in quality and quantity, as well as speed in operation and maintenance of definite size of threads untilchanged by will of operator.

A still further object of the invention is to rovide a lockin means for the die-head for holding the die in its proper and rigid position when the die is in operative position, and which is separate from the means for opening and closing the die-head,

To these ends my invention consists, generally stated, in the novel arrangement, construction and combination of parts, as hereinafter more'specifically set forth and described and particularly pointed out in the claims.

To enable others skilled in the art to which I my invention appertains to construct and use my improved die-head, I Wlll describe the same more fully, referring to the accompanying sheet of drawings, in which' V Figure 1 is a side elevation of my improved die-head in its closed position;

Fig. 2 is a sectional view on the line 22 Fig. 1, looking in the direction of the arrows and showing the threading die in po- Specification of Letters Patent. Patented sgptj 14, 1920, Y Application filed October 1, 1919. Serial No, 327,753.

3on each of the same and the semi-circular openings 4 in each of said sections intermediate of said extensions for thereception of the die 13 therein. The two yokes -1 andQ of the head A fit within a base'or support a which is'mounted in the usual head of a 'threadlng machine (not shown) and such yokes are connected together at the rear ends of the rear extensions 3 by means of the bolts 5 and 5 passing through the sameand head a, the 'outer' bolts 5 being mounted in slotted holes 6 in said extensions and head a and a plate 7 fitting over said extensions to permit the opening and closing movements of such yokes, the bolts 5 acting as pivotal points in such movements. f

Between the front extensionsB ofthe yokes 1 and 2 is the rocking lever '8, which is journaled on a pin 9 secured in the base plate a and is provided With'a slottedportion 10 in and 2', having the front and rear extensions each of its ends. An L-shaped lever- 11 is pivoted on the pin 12, at the end ofits short arm ineach of said slotted portions 10, and the longer arm of 'said levers 11 ispivoted at" its end, by the pin 13 within a recessed 'portion 14; inthe inner face of each of the front extensions 3 on the yokes land 2. An op5 eratinglever 15' is mounted on the pins 9 and 12 for moving the levers 8 and 11 injthe opening and closing of the yokes 1 and 2.

Between the front extensions 3 ofthe yokes land 2 and in the rear of the levers8 and 11 is a block 16, which. is secured to the base plate a by a threaded portion 16 and secured to said block by the screw-bolts '17 is a plate 18 foroverlapping the side faces of said extensions to hold the yokes in proper alinement with each other.

Extending through the end of the extension 3 on the upper yoke 1 is the screw-bolt gages 19, the threaded portion 20 of which en with said extension, and such bolt is provided with a head 21 at its outer end, while its, innor end is adapted to engage with a block 22 in the inner faceof thelower yoke for permitting the adjustment of such yokes in changing the size of the threads upon the article being threaded.

Passing through a hole 23in the end of the extension 3 in the upper yoke 1 is the locking bar 24:, which is provided-with a threaded portion 25 at its upper end, upon which the jam' nuts 26 engage beyond the outer 'faceof said yoke, and such hole is enlarged at its upper portion, as at 23 and is outwardly tapered at its lower portion to permit such bar to sivingoutivard and inward in yoke end. A dowelpin 27 passes through the locking bar 2 1 for engaging with the inner face of the upper yoke 1, which pin combined with the jam nuts 26 engaging with the outer face of said yoke will hold the bar in position, yet allow it to bemoved inward and outward in its locking and unlocking positions, and

. alsopermit the adjustment of such bar for operation. provided with a shoulder 28 on the inner face of the same for fitting under the outer face oftheyoke 2 when in looking position, and a handle 29 extends out from the outer face of such end for the easy handling of such locking bar in its locking and unlocking movements.

The use and operation of my improved die-head A is as follows:

The die Z is of the usual. form and con struction, such as is used in the exterior threading of pipe, by being of circular shape and formed in two halves, both of which when secured together within the openings 4 in the die-head A will allow the passing of the pipe (not shown) through the usual opening formed between such halves for being engaged by the threading means in the die extending into such opening, and such .die being held in such head by the usual 8 connected to. the lever 15 will be thrown to the angle shown in said figure, and short arms on the levers 11 pulled inward by also being connected to said lever,15, so that the front extensions 3, on the head A will be thrown outward. The pipe to be eXteriorly threaded can then be placed within the opening formed between the halves of the die 6 and set at the proper point for threading when the yokes 1 and 2 carrying such diehalves can be brought toward each other by the operator again grasping the lever 15 and handle 29 and by pulling down on said lever will thus move the lever 8 to a horizontal position and the levers 11outward to allow the long arms on said levers 11 to enter the recessed portions 14; in the front extensions 3. This will cause the front extensions to be brought toward each other and thus allow the closing of the die-head A so that the threading of the pipe can be made by the means on the die t engaging with the exterior of the pipe, and when so closed the operator simply moves the locking bar 2 1 The inner end of the bar 2 1 is' compound lever motion for the'opening and inward by the handle 29 in order to allow the shoulder 28 on said bar to fit under the end of the extension 3 on the lower yoke 2- and thereby lock the yokes 1 and 2 in their closed positions.

Various modifications and changes in the design and construction of my improved diehead may be resorted to without departing from, the spirit of the invention or sacrificing any of its advantages. 7

'It will thus be seen that inthe use of my improved quick-opening and closing diehead, the operations will require less effort on part of the operator than with ordinary forms ofdie-heads, while less wear will be had onwearing parts and fewer wearing parts will be provided than in the usual con structions.

It will further be seen that by use of the closingof' the die-head, a quick and easy movement is effected which will readily and conveniently open the head to release the threaded pipe and close the same'when the pipe is to be threaded, while the opening of the die-head and unlocking of the same can be made at one operation, and such locking ofthe head'will be rigid and positive and can easily and quickly be made when desired.

vWhat I claim as my invention and desire to secure by Letters Patent is 1. A die head formed of two yokes movably connected together at one end, lever means positioned entirely between the yokes at the opposite end' of the same for opening and closing said yokes, said yokes being re cessed for the reception of said lever means when in closed position, and operating means for the lever means at. one side thereof. 7

2. A die-head formed of two yokes and movably connected together at one end, a rocking lever having both ends slotted mounted between the other end of said yokes, and levers pivoted at one end to the slotted ends of said lever and at the opposite end to said yokes for opening and closing said yokes. V

3. A. die-head formed of two yokes and movably connected together at one end, a rocking lever mounted between the other end of said yokes, Lshaped levers pivoted to said lever and to said yokes, and an operating lever for moving the same and said. L-shaped levers in the opening and closing of said yokes.

it. A die-head formed of two yokes movably connected to a common supporting means at one end, means disposed between the yokes for ellecting the opening and closing thereof, said yokes being recessed at said end to receive the operating means when in closed position, and independent means for locking the yokes in closed position.

5. A die-head formed of tWo yokes and movahly connected together at one end,

means for opening and closing said yokes,.

and a locking bar movably and adjustably carried by one of said yokes for engaging with the other yoke to hold said yokes in position. i

6. A die-head formed of tWo yokes and -movab1y connected together at one end, 10 means for opening and closing said yokes,

and a locking bar movably and adjustably carried by one of said yokes and having a V shoulder for engaging With the other yoke to hold said yokes in position.

In testimony whereof, I, the Said WIL- IS 

